CN201470802U

CN201470802U - Free-forging shortening anvil at ultra-limit aspect ratio

Info

Publication number: CN201470802U
Application number: CN200920166329XU
Authority: CN
Inventors: 钟诚道; 林海涛; 王献文; 王勇; 罗顺成; 李先伟
Original assignee: Southwest Aluminum Group Co Ltd
Current assignee: Southwest Aluminum Group Co Ltd
Priority date: 2009-07-31
Filing date: 2009-07-31
Publication date: 2010-05-19
Anticipated expiration: 2019-07-31

Abstract

The utility model discloses a free-forging shortening anvil at ultra-limit aspect ratio, which includes a lower internal concave anvil at the lower end of the bearing round cast ingot and an upper internal concave anvil which applies pressure from the upper end of the round cast ingot downwards. The upper and the lower internal concave anvil are positioned with central lines thereof overlapped with each other, and the working surface thereof are opposite internal concave surfaces. The shortening anvil can create an environment without destabilization occurrence during the shortening process for the aluminum alloy shortening, which ensure the smooth execution of the shortening process with deficits of bending and folding. The ratio between the length of the diameter of the aluminum alloy round cast ingot is larger than 3, so that the sufficient metal surplus is provided for the development of the aluminum alloy annular forged piece.

Description

Open die forging ratio of height to diameter ultralimit jumping-up anvil

Technical field

The utility model relates to the jumping-up anvil block that uses in the cogging of aluminum alloy forge piece open die forging, belongs to the aluminium alloy manufacture field.

Background technology

The employed blank of large aluminum alloy forging generally all adopts the circle ingot casting, for interior tissue and the performance of improving forging, and obtain certain shape and size, for subsequent production forging part or rolling annular forging piece provide desirable blank, often all to carry out hammer cogging to the circle ingot casting, and jumping-up is a most important operation in the hammer cogging, traditional open die forging jumping-up anvil as shown in Figure 1, the last anvil 11 of this jumping-up anvil and the working face of following anvil 12 are the plane, owing to limited by stability condition, when H (or L) greater than

The time, original aluminum alloy ingot blank 3 can bend in forging thick process, and final the generation folds, and causes and scraps, and can not produce the forging blank that meets the demands.Therefore people become the jumping-up rule with this regularity summarization:

In the last hundred years, people think that always this rule is impassable in the aluminum alloy forge piece production, strictly observe.

Development along with the Aeronautics and Astronautics cause, the aluminum alloy forge piece forward maximizes, the integration direction develops, provide bigger, heavier aluminum alloy forge piece task just to put in face of us for this reason, be subjected to the constraint of aluminum alloy melt casting level and time, funds, what aluminium alloy round cast ingot can not be done again in very short time is very big.At present, southwestern Aluminum only can provide

Qualified aluminium alloy round cast ingot, in addition, along with the aluminium alloy cast ingot cross dimensions increases, the more difficult control of ingot metallurgy quality.Therefore how to utilize southwestern Aluminum existing maximum

Aluminium alloy round cast ingot, produce the aluminium alloy annular forging piece of nearly three tons of weights, only look for another way.

As everyone knows, the weight G ingot of open die forging ingot blank must be forged greater than the weight G of forging, and according to the difference of each enterprise's mode of production, level, its metal surplus capacity Δ is also different, and their relation is:

G _Ingot=Δ * G _Forge-----------＜2 〉

Wherein

---billet diameter, H (or L)---billet length, γ---proportion

From＜3〉formula as can be seen, when Select after the maximum 820mm, want to increase the G ingot, only way is to increase ingot blank length H (or L), and the increase of H (or L) is subjected to＜and the constraint of 1〉jumping-up rule, the longest can only being increased to Be 2460mm.According to

Calculate, its weight metal does not reach the enough metal surplus capacity Δs of this aluminium alloy annular forging piece production, will hinder the development of this aluminium alloy annular forging piece.

The utility model content

The purpose of this utility model is to provide a kind of open die forging ratio of height to diameter ultralimit jumping-up anvil that can carry out jumping-up to L/D ratio greater than 3 aluminium alloy round cast ingot.

The utility model adopts following technical scheme:

A kind of jumping-up anvil of open die forging ratio of height to diameter ultralimit jumping-up comprises following indent anvil that is used for support circle ingot casting lower end and the last indent anvil of exerting pressure from circle ingot casting upper end downwards, upper and lower indent anvil location and central lines, and its working face is relative inner concave.

Preferably, described upper and lower indent anvil offers keyway respectively, and by upper and lower key locking.

Preferably, the curved or taper of the inner concave of described upper and lower indent anvil.

Preferably, the inner concave of described upper and lower indent anvil has between the radian of multiple different radii and the cambered surface and seamlessly transits.

Jumping-up anvil provided by the utility model can be the aluminium alloy round cast ingot jumping-up and creates the environment that does not occur unstability in the upsetting process, guarantee that upsetting process is stable and carry out, bending, defective such as folding do not appear, broken through the impassable rule of aluminium alloy jumping-up in the last hundred years, make the aluminium alloy round cast ingot L/D ratio greater than 3, reach 3.3

Just

Circle is after ingot casting is increased to 2700mm from 2460mm, and length increases 240mm, and weight increases 360kg, for the development of aluminium alloy annular forging piece provides enough metal surplus capacities, has created loose environment.

Description of drawings

Fig. 1 is the structural representation of a kind of typical plane upsetting anvil in the prior art;

Fig. 2 provides the structural representation of a kind of specific embodiment of open die forging ratio of height to diameter ultralimit jumping-up anvil for the utility model;

Fig. 3 is the schematic rear view of open die forging ratio of height to diameter ultralimit jumping-up anvil shown in Figure 2;

Fig. 4 is the front schematic view of open die forging ratio of height to diameter ultralimit jumping-up anvil shown in Figure 2;

Fig. 5 provides the structural representation of the another kind of specific embodiment of open die forging ratio of height to diameter ultralimit jumping-up anvil for the utility model;

Fig. 6 provides the upsetting process schematic diagram of open die forging ratio of height to diameter ultralimit jumping-up anvil for utilizing the utility model.

Description of reference numerals is as follows:

1---go up the indent anvil

2,2 '---following indent anvil

3---the aluminium alloy ingot blank

4---keyway

5---play repeated hole

11---go up anvil

12---following anvil

The specific embodiment

Core of the present utility model provides a kind of open die forging ratio of height to diameter ultralimit jumping-up anvil that can carry out jumping-up to L/D ratio greater than 3 aluminium alloy round cast ingot.

In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Please refer to Fig. 2, Fig. 3, Fig. 4, jumping-up anvil in this specific embodiment, comprise following indent anvil 2 that is used for support circle ingot casting lower end and the last indent anvil 1 of exerting pressure downwards from circle ingot casting upper end, its inner concave is all curved, upper and lower indent anvil location and central lines, its working face is relative inner concave, and upper and lower indent anvil offers keyway 4 respectively, and by upper and lower key locking.

During this jumping-up anvil work, indent anvil 1, following indent anvil 2 must be used key locking up and down in the requirement, and four limits of upper and lower indent anvil are equipped with the keyway 4 of extension inwards, guarantee upper and lower indent anvil central lines, and indent anvil both sides have offered repeated hole 5.

Please refer to Fig. 6, during production aluminium alloy ingot blank 3 is hung on following indent anvil 1, adjust the center line of position assurance aluminium alloy ingot blank 3 and (see Fig. 6 a) with indent anvil central lines up and down, at this moment, upper and lower anvil spacing is 2325mm, behind to be adjusted the finishing, the hydraulic press moved cross beam is moved down again, exert pressure slowly for aluminium alloy ingot blank 3, the outer of beginning aluminium alloy ingot blank 3 upper and lower end faces deforms.

Along with last indent anvil 1 constantly descends, cavity between aluminium alloy ingot blank 3 both ends of the surface and the indent anvil progressively fills up, the indent anvil also overlaps with the axial line of aluminium alloy ingot blank gradually to the active force of aluminium alloy ingot blank end face, being the indent anvil constantly, little by little is reduced to 0 to the angle of end-acted force direction of aluminium alloy ingot blank and axial line o-o from the θ degree, final indent anvil force direction overlaps with aluminium alloy ingot blank axial line, do not form the condition of moment of torsion, unstable phenomenon takes place when having avoided aluminium alloy ingot blank jumping-up.

Meanwhile, aluminium alloy ingot blank L/D ratio is also with the carrying out of upsetting process, its ratio constantly diminishes, this just more helps preventing by jumping-up aluminium alloy ingot blank unstability (seeing Fig. 6 b), this moment, upper and lower anvil spacing was 900mm, to descend the indent anvil to be replaced by flat anvil, hung on flat anvil down (seeing Fig. 6 c) to a certain degree aluminium alloy ingot blank by jumping-up, this moment, upper and lower anvil spacing was 1220mm, last indent anvil further descends, the arc lower end that the aluminium alloy ingot blank is formed in above-mentioned steps upset flat (seeing Fig. 6 d).

This moment, upper and lower anvil spacing was 1100mm, to go up the indent anvil and be replaced by flat anvil (seeing Fig. 6 e), this moment, upper and lower anvil spacing was 1420mm, going up the indent anvil then further descends, the arc-shaped upper ends that the aluminium alloy ingot blank is formed in step (3), (4) is upset flat, it is 570mm (seeing Fig. 6 f) that last indent anvil continues to drop to upper and lower anvil spacing, finishes L/D ratio greater than 3 aluminium alloy ingot blank jumping-up.

According to the metal surplus capacity needs of the aluminium alloy annular forging piece of producing nearly three tons of weights, adopt

Aluminium alloy round cast ingot just enough, promptly The circle ingot casting from

Increase to

Weight increases 360kg, and the method is adopted in evidence, selects for use Aluminium alloy round cast ingot can complete successfully jumping-up cogging operation, roll out the qualified aluminium alloy annular forging piece of size, this jumping-up anvil is to the breakthrough of open die forging jumping-up rule in the last hundred years, expand a new road for utilizing existing diameter ingot casting to produce heavy forging, be applicable to the jumping-up of various circular cylindrical shape materials such as round ingot casting, round bar, circular forging rod.

Please refer to Fig. 5, when circle ingot casting diameter hour, if still adopt the bigger inner concave of radian, the cavity between circle ingot casting both ends of the surface and the indent anvil is just very little, can not limit the distortion of round ingot casting well, its effect is equal to flat anvil, at this situation, upper and lower indent anvil can be designed to shape as shown in Figure 5, indent anvil 2 ' be illustrated only is shown down among the figure, its inner concave has between the radian of four kinds of different radiis and the cambered surface and seamlessly transits, to adapt to the round ingot casting of different size.

More than open die forging ratio of height to diameter ultralimit jumping-up anvil provided by the utility model is described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand core concept of the present utility model.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.

Claims

1. open die forging ratio of height to diameter ultralimit jumping-up anvil, it is characterized in that, comprise following indent anvil that is used for support circle ingot casting lower end and the last indent anvil of exerting pressure downwards from circle ingot casting upper end, upper and lower indent anvil location and central lines, its working face is relative inner concave.

2. open die forging ratio of height to diameter ultralimit jumping-up anvil according to claim 1 is characterized in that described upper and lower indent anvil offers keyway respectively, and by upper and lower key locking.

3. open die forging ratio of height to diameter ultralimit jumping-up anvil according to claim 1 is characterized in that the curved or taper of the inner concave of described upper and lower indent anvil.

4. open die forging ratio of height to diameter ultralimit jumping-up anvil according to claim 1 is characterized in that, the inner concave of described upper and lower indent anvil has between the radian of multiple different radii and the cambered surface and seamlessly transits.